Soil erosion is a natural process in undisturbed ecosystems.
Answer the following statement true (T) or false (F)
True
In undisturbed ecosystems, the amount of soil erosion is balanced by the amount of new soil formation. In both cases, the process is very slow.
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____________________ involves using natural or genetically engineered plants to absorb, filter and remove contaminants from polluted soil and water.
Fill in the blank(s) with the appropriate word(s).
What happened to California in 1848 that resulted in a massive influx of American settlers during the next few years?
A) The last native groups were controlled or eliminated. B) The transcontinental railroad was completed. C) California became part of the United States. D) Gold was discovered in the foothills of the Sierra Nevadas.
An area that experiences semidiurnal tides will have ________
A) one high tide and one low tide daily B) one high tide and two low tides daily C) one low tide and two high tides daily D) two high tides and two low tides of nearly equal height daily E) two unequal low and high tides daily
GIS is an acronym for this
A. Geographic Information System. B. Graphical Interface System. C. Geologic Information System. D. Global Information System.